ACK-118 BK • Numeric silicone keyboard – dust- and waterproof (IP64) • Noiseless and soft stroke due to sealed short-travel keys • Integrated multifunction key for the start of the calculator under Windows • Blue status LEDs for Num Lock function • USB connector with spring-driven cable reels • Plug & Play installation without any special driver • Appealing retail packaging • Ideal for mobile use as well as for all dirty, moist and respectively hygienic applications